【简答题】Reading Comprehension(阅读理解)Passage4 Look closely at your hands. Are they clean? It doesn't matter how many times you wash your hands, tiny microbes (微生物) still stay on them. But don't worry. Most mi...
【单选题】听力原文: New product introductions are healthy for the industry. They generate excitement in the marketplace and sales in your store. Many of your customers are anxious to learn about what's new. By havi...